CN106807451A - A kind of flexible platinum formaldehyde room temperature oxidation catalyst and preparation method thereof - Google Patents
A kind of flexible platinum formaldehyde room temperature oxidation catalyst and preparation method thereof Download PDFInfo
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- CN106807451A CN106807451A CN201710036633.1A CN201710036633A CN106807451A CN 106807451 A CN106807451 A CN 106807451A CN 201710036633 A CN201710036633 A CN 201710036633A CN 106807451 A CN106807451 A CN 106807451A
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- cotton fiber
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- temperature oxidation
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- 239000003054 catalyst Substances 0.000 title claims abstract description 59
- 230000003647 oxidation Effects 0.000 title claims abstract description 37
- 238000007254 oxidation reaction Methods 0.000 title claims abstract description 37
- 238000002360 preparation method Methods 0.000 title claims abstract description 20
- ZFBYFCMUNLWXTK-UHFFFAOYSA-N formaldehyde;platinum Chemical compound [Pt].O=C ZFBYFCMUNLWXTK-UHFFFAOYSA-N 0.000 title claims description 6
- WSFSSNUMVMOOMR-UHFFFAOYSA-N Formaldehyde Chemical compound O=C WSFSSNUMVMOOMR-UHFFFAOYSA-N 0.000 claims abstract description 100
- 229920000742 Cotton Polymers 0.000 claims abstract description 86
- GWEVSGVZZGPLCZ-UHFFFAOYSA-N titanium dioxide Inorganic materials O=[Ti]=O GWEVSGVZZGPLCZ-UHFFFAOYSA-N 0.000 claims abstract description 85
- BASFCYQUMIYNBI-UHFFFAOYSA-N platinum Substances [Pt] BASFCYQUMIYNBI-UHFFFAOYSA-N 0.000 claims abstract description 78
- 239000002131 composite material Substances 0.000 claims abstract description 40
- OGIDPMRJRNCKJF-UHFFFAOYSA-N titanium oxide Inorganic materials [Ti]=O OGIDPMRJRNCKJF-UHFFFAOYSA-N 0.000 claims abstract description 23
- 229910021650 platinized titanium dioxide Inorganic materials 0.000 claims abstract description 16
- 239000011248 coating agent Substances 0.000 claims abstract description 15
- 238000000576 coating method Methods 0.000 claims abstract description 15
- 239000002245 particle Substances 0.000 claims abstract description 9
- 238000005238 degreasing Methods 0.000 claims abstract description 3
- YRKCREAYFQTBPV-UHFFFAOYSA-N acetylacetone Chemical compound CC(=O)CC(C)=O YRKCREAYFQTBPV-UHFFFAOYSA-N 0.000 claims description 68
- HEMHJVSKTPXQMS-UHFFFAOYSA-M Sodium hydroxide Chemical compound [OH-].[Na+] HEMHJVSKTPXQMS-UHFFFAOYSA-M 0.000 claims description 39
- 239000002253 acid Substances 0.000 claims description 35
- 239000000463 material Substances 0.000 claims description 31
- 238000000034 method Methods 0.000 claims description 29
- 239000000243 solution Substances 0.000 claims description 28
- 239000000758 substrate Substances 0.000 claims description 23
- 239000008139 complexing agent Substances 0.000 claims description 21
- 239000003638 chemical reducing agent Substances 0.000 claims description 20
- 238000001035 drying Methods 0.000 claims description 20
- 238000003756 stirring Methods 0.000 claims description 19
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 19
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 15
- 239000007864 aqueous solution Substances 0.000 claims description 15
- 230000008569 process Effects 0.000 claims description 15
- 239000000835 fiber Substances 0.000 claims description 12
- 230000006641 stabilisation Effects 0.000 claims description 12
- 238000011105 stabilization Methods 0.000 claims description 12
- FPCJKVGGYOAWIZ-UHFFFAOYSA-N butan-1-ol;titanium Chemical compound [Ti].CCCCO.CCCCO.CCCCO.CCCCO FPCJKVGGYOAWIZ-UHFFFAOYSA-N 0.000 claims description 10
- 238000004140 cleaning Methods 0.000 claims description 10
- 239000011259 mixed solution Substances 0.000 claims description 10
- -1 Titanium alkoxides Chemical class 0.000 claims description 9
- 239000012670 alkaline solution Substances 0.000 claims description 9
- 239000000203 mixture Substances 0.000 claims description 8
- 241000370738 Chlorion Species 0.000 claims description 7
- 239000001509 sodium citrate Substances 0.000 claims description 7
- 239000010936 titanium Substances 0.000 claims description 7
- 229910052719 titanium Inorganic materials 0.000 claims description 7
- HRXKRNGNAMMEHJ-UHFFFAOYSA-K trisodium citrate Chemical compound [Na+].[Na+].[Na+].[O-]C(=O)CC(O)(CC([O-])=O)C([O-])=O HRXKRNGNAMMEHJ-UHFFFAOYSA-K 0.000 claims description 7
- 229940038773 trisodium citrate Drugs 0.000 claims description 7
- 230000002378 acidificating effect Effects 0.000 claims description 6
- 239000003513 alkali Substances 0.000 claims description 6
- 239000012279 sodium borohydride Substances 0.000 claims description 6
- 229910000033 sodium borohydride Inorganic materials 0.000 claims description 6
- KCXVZYZYPLLWCC-UHFFFAOYSA-N EDTA Chemical compound OC(=O)CN(CC(O)=O)CCN(CC(O)=O)CC(O)=O KCXVZYZYPLLWCC-UHFFFAOYSA-N 0.000 claims description 5
- ZLMJMSJWJFRBEC-UHFFFAOYSA-N Potassium Chemical group [K] ZLMJMSJWJFRBEC-UHFFFAOYSA-N 0.000 claims description 5
- 229910052700 potassium Inorganic materials 0.000 claims description 5
- 239000011591 potassium Substances 0.000 claims description 5
- QAOWNCQODCNURD-UHFFFAOYSA-N Sulfuric acid Chemical compound OS(O)(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-N 0.000 claims description 4
- 235000011114 ammonium hydroxide Nutrition 0.000 claims description 3
- 239000002082 metal nanoparticle Substances 0.000 claims description 3
- GRYLNZFGIOXLOG-UHFFFAOYSA-N Nitric acid Chemical compound O[N+]([O-])=O GRYLNZFGIOXLOG-UHFFFAOYSA-N 0.000 claims description 2
- 238000002156 mixing Methods 0.000 claims description 2
- 229910017604 nitric acid Inorganic materials 0.000 claims description 2
- 239000004408 titanium dioxide Substances 0.000 claims description 2
- 239000003109 Disodium ethylene diamine tetraacetate Substances 0.000 claims 1
- 235000019301 disodium ethylene diamine tetraacetate Nutrition 0.000 claims 1
- 238000007654 immersion Methods 0.000 claims 1
- 230000003197 catalytic effect Effects 0.000 abstract description 6
- 150000001875 compounds Chemical class 0.000 abstract description 3
- 239000006185 dispersion Substances 0.000 abstract description 3
- 239000010970 precious metal Substances 0.000 abstract description 3
- 239000000126 substance Substances 0.000 abstract description 3
- 235000019256 formaldehyde Nutrition 0.000 description 29
- 229910052697 platinum Inorganic materials 0.000 description 22
- VXUYXOFXAQZZMF-UHFFFAOYSA-N titanium(IV) isopropoxide Chemical compound CC(C)O[Ti](OC(C)C)(OC(C)C)OC(C)C VXUYXOFXAQZZMF-UHFFFAOYSA-N 0.000 description 12
- 239000003795 chemical substances by application Substances 0.000 description 11
- 230000000694 effects Effects 0.000 description 10
- 239000002105 nanoparticle Substances 0.000 description 8
- NGNBDVOYPDDBFK-UHFFFAOYSA-N 2-[2,4-di(pentan-2-yl)phenoxy]acetyl chloride Chemical compound CCCC(C)C1=CC=C(OCC(Cl)=O)C(C(C)CCC)=C1 NGNBDVOYPDDBFK-UHFFFAOYSA-N 0.000 description 7
- 239000008367 deionised water Substances 0.000 description 7
- 229910021641 deionized water Inorganic materials 0.000 description 7
- 229910000510 noble metal Inorganic materials 0.000 description 7
- 239000002585 base Substances 0.000 description 6
- 238000006555 catalytic reaction Methods 0.000 description 6
- 238000004062 sedimentation Methods 0.000 description 5
- 230000009467 reduction Effects 0.000 description 4
- QTBSBXVTEAMEQO-UHFFFAOYSA-N Acetic acid Chemical compound CC(O)=O QTBSBXVTEAMEQO-UHFFFAOYSA-N 0.000 description 3
- 241000241602 Gossypianthus Species 0.000 description 3
- 230000008901 benefit Effects 0.000 description 3
- 239000000969 carrier Substances 0.000 description 3
- 230000008859 change Effects 0.000 description 3
- 238000007598 dipping method Methods 0.000 description 3
- 238000005516 engineering process Methods 0.000 description 3
- IDGUHHHQCWSQLU-UHFFFAOYSA-N ethanol;hydrate Chemical compound O.CCO IDGUHHHQCWSQLU-UHFFFAOYSA-N 0.000 description 3
- 238000001802 infusion Methods 0.000 description 3
- 230000001590 oxidative effect Effects 0.000 description 3
- 239000002243 precursor Substances 0.000 description 3
- 238000005406 washing Methods 0.000 description 3
- CSCPPACGZOOCGX-UHFFFAOYSA-N Acetone Chemical compound CC(C)=O CSCPPACGZOOCGX-UHFFFAOYSA-N 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- 230000010718 Oxidation Activity Effects 0.000 description 2
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 2
- 238000000026 X-ray photoelectron spectrum Methods 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- FFBHFFJDDLITSX-UHFFFAOYSA-N benzyl N-[2-hydroxy-4-(3-oxomorpholin-4-yl)phenyl]carbamate Chemical compound OC1=C(NC(=O)OCC2=CC=CC=C2)C=CC(=C1)N1CCOCC1=O FFBHFFJDDLITSX-UHFFFAOYSA-N 0.000 description 2
- 238000010041 electrostatic spinning Methods 0.000 description 2
- 238000001704 evaporation Methods 0.000 description 2
- 230000008020 evaporation Effects 0.000 description 2
- 238000000445 field-emission scanning electron microscopy Methods 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- WSFSSNUMVMOOMR-NJFSPNSNSA-N methanone Chemical compound O=[14CH2] WSFSSNUMVMOOMR-NJFSPNSNSA-N 0.000 description 2
- 239000002121 nanofiber Substances 0.000 description 2
- 238000000746 purification Methods 0.000 description 2
- 238000011160 research Methods 0.000 description 2
- ZOXJGFHDIHLPTG-UHFFFAOYSA-N Boron Chemical compound [B] ZOXJGFHDIHLPTG-UHFFFAOYSA-N 0.000 description 1
- 241001269238 Data Species 0.000 description 1
- QXNVGIXVLWOKEQ-UHFFFAOYSA-N Disodium Chemical compound [Na][Na] QXNVGIXVLWOKEQ-UHFFFAOYSA-N 0.000 description 1
- 241000196324 Embryophyta Species 0.000 description 1
- PIICEJLVQHRZGT-UHFFFAOYSA-N Ethylenediamine Chemical compound NCCN PIICEJLVQHRZGT-UHFFFAOYSA-N 0.000 description 1
- LLQPHQFNMLZJMP-UHFFFAOYSA-N Fentrazamide Chemical compound N1=NN(C=2C(=CC=CC=2)Cl)C(=O)N1C(=O)N(CC)C1CCCCC1 LLQPHQFNMLZJMP-UHFFFAOYSA-N 0.000 description 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 description 1
- 229920005479 Lucite® Polymers 0.000 description 1
- 240000007594 Oryza sativa Species 0.000 description 1
- 235000007164 Oryza sativa Nutrition 0.000 description 1
- HGWOWDFNMKCVLG-UHFFFAOYSA-N [O--].[O--].[Ti+4].[Ti+4] Chemical compound [O--].[O--].[Ti+4].[Ti+4] HGWOWDFNMKCVLG-UHFFFAOYSA-N 0.000 description 1
- 125000002777 acetyl group Chemical group [H]C([H])([H])C(*)=O 0.000 description 1
- 239000004480 active ingredient Substances 0.000 description 1
- 239000000654 additive Substances 0.000 description 1
- 230000000996 additive effect Effects 0.000 description 1
- 238000004887 air purification Methods 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 238000004458 analytical method Methods 0.000 description 1
- 150000001450 anions Chemical class 0.000 description 1
- 229910052796 boron Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 230000015556 catabolic process Effects 0.000 description 1
- 235000013339 cereals Nutrition 0.000 description 1
- 229910000420 cerium oxide Inorganic materials 0.000 description 1
- 230000000536 complexating effect Effects 0.000 description 1
- 238000006731 degradation reaction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 230000008021 deposition Effects 0.000 description 1
- 238000010586 diagram Methods 0.000 description 1
- 238000005265 energy consumption Methods 0.000 description 1
- 230000007613 environmental effect Effects 0.000 description 1
- 239000003344 environmental pollutant Substances 0.000 description 1
- 238000011049 filling Methods 0.000 description 1
- 239000008098 formaldehyde solution Substances 0.000 description 1
- 125000002485 formyl group Chemical class [H]C(*)=O 0.000 description 1
- 239000007789 gas Substances 0.000 description 1
- PCHJSUWPFVWCPO-UHFFFAOYSA-N gold Chemical compound [Au] PCHJSUWPFVWCPO-UHFFFAOYSA-N 0.000 description 1
- 239000010931 gold Substances 0.000 description 1
- 229910052737 gold Inorganic materials 0.000 description 1
- 238000010438 heat treatment Methods 0.000 description 1
- 238000002173 high-resolution transmission electron microscopy Methods 0.000 description 1
- 229910052739 hydrogen Inorganic materials 0.000 description 1
- 239000001257 hydrogen Substances 0.000 description 1
- 230000006872 improvement Effects 0.000 description 1
- 229910052809 inorganic oxide Inorganic materials 0.000 description 1
- 238000011031 large-scale manufacturing process Methods 0.000 description 1
- 239000007788 liquid Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 229910052751 metal Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 229910000000 metal hydroxide Inorganic materials 0.000 description 1
- 150000004692 metal hydroxides Chemical class 0.000 description 1
- 229910044991 metal oxide Inorganic materials 0.000 description 1
- 150000004706 metal oxides Chemical class 0.000 description 1
- 239000002808 molecular sieve Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- TWNQGVIAIRXVLR-UHFFFAOYSA-N oxo(oxoalumanyloxy)alumane Chemical compound O=[Al]O[Al]=O TWNQGVIAIRXVLR-UHFFFAOYSA-N 0.000 description 1
- BMMGVYCKOGBVEV-UHFFFAOYSA-N oxo(oxoceriooxy)cerium Chemical compound [Ce]=O.O=[Ce]=O BMMGVYCKOGBVEV-UHFFFAOYSA-N 0.000 description 1
- 238000006385 ozonation reaction Methods 0.000 description 1
- 230000001699 photocatalysis Effects 0.000 description 1
- 231100000719 pollutant Toxicity 0.000 description 1
- 239000004926 polymethyl methacrylate Substances 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 239000002994 raw material Substances 0.000 description 1
- 239000000376 reactant Substances 0.000 description 1
- 238000011946 reduction process Methods 0.000 description 1
- 235000009566 rice Nutrition 0.000 description 1
- 238000005201 scrubbing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 239000000377 silicon dioxide Substances 0.000 description 1
- URGAHOPLAPQHLN-UHFFFAOYSA-N sodium aluminosilicate Chemical compound [Na+].[Al+3].[O-][Si]([O-])=O.[O-][Si]([O-])=O URGAHOPLAPQHLN-UHFFFAOYSA-N 0.000 description 1
- 238000012360 testing method Methods 0.000 description 1
- 230000001988 toxicity Effects 0.000 description 1
- 231100000419 toxicity Toxicity 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01J—CHEMICAL OR PHYSICAL PROCESSES, e.g. CATALYSIS OR COLLOID CHEMISTRY; THEIR RELEVANT APPARATUS
- B01J31/00—Catalysts comprising hydrides, coordination complexes or organic compounds
- B01J31/26—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24
- B01J31/38—Catalysts comprising hydrides, coordination complexes or organic compounds containing in addition, inorganic metal compounds not provided for in groups B01J31/02 - B01J31/24 of titanium, zirconium or hafnium
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D53/00—Separation of gases or vapours; Recovering vapours of volatile solvents from gases; Chemical or biological purification of waste gases, e.g. engine exhaust gases, smoke, fumes, flue gases, aerosols
- B01D53/34—Chemical or biological purification of waste gases
- B01D53/74—General processes for purification of waste gases; Apparatus or devices specially adapted therefor
- B01D53/86—Catalytic processes
- B01D53/8668—Removing organic compounds not provided for in B01D53/8603 - B01D53/8665
-
- B01J35/58—
-
- B01J35/64—
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B01—PHYSICAL OR CHEMICAL PROCESSES OR APPARATUS IN GENERAL
- B01D—SEPARATION
- B01D2259/00—Type of treatment
- B01D2259/45—Gas separation or purification devices adapted for specific applications
- B01D2259/4508—Gas separation or purification devices adapted for specific applications for cleaning air in buildings
Abstract
The present invention relates to a kind of flexible Pt formaldehyde room temperature oxidation catalysts and preparation method thereof, and in particular to a kind of Pt/TiO2Flexible compound formaldehyde room temperature oxidation catalyst of/cotton fiber and preparation method thereof.The catalyst includes degreasing cotton fiber carrier, nano-TiO2Face coat and it is dispersed in TiO2The Pt active components of coating surface, wherein Pt active components exist in zeroth order form, the nm of particle size range 1 10, and load capacity is 0.05 2 wt %.The Pt/TiO that the present invention is provided2The features such as/cotton fiber composite formaldehyde room-temperature oxidation catalyst has graduation mesopore macroporous structure, lightweight and flexibility, Pt and TiO2It is firmly combined between coating and carrier cotton fiber, active component simple substance Pt is in TiO2Coating surface good dispersion, particle diameter are small, efficient catalytic decomposing formaldehyde by room temperature, and precious metals pt consumption is small, vapour lock is small, is suitable for being used in all kinds of air purifiers.
Description
Technical field
The present invention relates to a kind of Pt/TiO2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst, belongs to indoor air purification
Field.
Background technology
Formaldehyde is one of topmost pollutant in room air, with larger toxicity.At present, indoor formaldehyde is eliminated dirty
Dye has turned into the hot research problem of field of environmental improvement.In existing methanal removing method, room temperature catalytic oxidation method is relative
In other manner（Absorption method, absorption process, anion oxidizing process, catalytic ozonation method, biofiltration/plant purification method, low temperature
Plasma method and photocatalytic oxidation etc.）With unique advantage, it can be carried out at normal temperatures and pressures, methanal removing efficiency
Height, equipment is simple, is the methanal removing technology of most application potential the advantages of long lifespan.In recent years, technology air indoors
Purification applications research constantly makes progress and breaks through, such as Chinese invention patent CN200410047973.7,
CN200410102837.3、CN200910215887.5、CN200910098634.4、CN200910047376.7、
CN200610011663.9, CN200710121423.9, CN201210389227.0 and CN201410015867.4, in patent
Metal oxide carrier is first prepared in CN200410047973.7, evaporation is obtained after being then immersed in the solution of noble metal component,
But the state of the catalyst active ingredient noble metal is not indicated, activity is relatively low.It is well known that to obtain high and stabilization formaldehyde
Catalytic oxidation activity, catalyst is it is necessary to have good dispersiveness, less particle diameter and appropriate valence state.And most of patent is such as
CN200410102837.3、CN200910215887.5、CN200910098634.4、CN200910047376.7、
Gold Samples category prepared by method for preparing catalyst described in CN200610011663.9 and CN200710121423.9
May exist in the form of the oxide, and bad dispersibility, this will influence whether the raising of activity；And if to obtain the expensive of 0 valency
Metal, in addition it is also necessary to the H of high temperature2Reduction process, makes process complications, and cost is also accordingly improved.Patent CN201210389227.0
Report a kind of preparation method of formaldehyde room temperature oxidation catalyst, the method with porous inorganic oxide as carrier, with boron hydrogen
It is reducing agent that change is received, and soluble metal hydroxide is additive, by dipping-room temperature reduction-sedimentation and noble metal precursor
Precursor reactant is obtained.The room temperature catalytic oxidation of catalyst is the method achieve, catalysis activity higher is also shown.But it is disclosed above
The catalyst prepared in patent is with common porous inorganic matter nano particle from from the point of view of practicality, mostly（Such as titanium dioxide
Titanium, aluminum oxide, molecular sieve, cerium oxide and silica etc.）For carrier is obtained, these catalyst are as applied to filled-type cleaning equipment
In need compressing tablet or be further supported on other bulk type carriers to use, this can make process complications, and exist
Catalysis activity declines, vapour lock is big and the caducous problem of catalyst.To overcome drawbacks described above, patent CN201410015867.4 with
TiO prepared by method of electrostatic spinning2It is carrier, carried noble metal/TiO is prepared for dipping ~ room temperature reduction ~ sedimentation2It is compound to urge
Agent, freshly prepd catalyst need not be loaded again, and with catalysis activity and less air drag higher, but the catalysis
Agent is due to being with inorganic TiO2Nanofiber substrate, therefore increase with the reduction of fibre diameter with fragility, and fragility,
Can so cause constantly be broken off in use, original fibre structure is progressively corrupted such that vapour lock also gradually increases
Greatly.And for removing remains chlorion in subsequent handling during noble-metal-supported（From noble metal precursor body）And need a heating
The process of evaporation, therefore technique is still more complicated.Meanwhile, electrostatic spinning prepares TiO2Fiber still suffers from high expensive, equipment requirement
High, large-scale production also be present.
The content of the invention
The technical problems to be solved by the invention are in view of the shortcomings of the prior art and provide a kind of compound first of flexible Pt
A kind of aldehyde room-temperature oxidation catalyst and preparation method thereof, and in particular to Pt/TiO2/ cotton fiber composite formaldehyde Oxidation at room temperature is catalyzed
Agent and preparation method thereof.
In order to solve the above technical problems, the technical solution adopted by the present invention is as follows：
A kind of Pt/TiO2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst, including cotton fiber carrier, TiO2Face coat
Be dispersed in TiO2The Pt active components of coating surface, described cotton fiber carrier is degreasing cotton fiber, and itself just has
Graduation macropore-central hole structure, the TiO2Coating is nanometer titanium dioxide coating, and described Pt exists in zeroth order form, grain
The nm of footpath scope 1 ~ 10.
In such scheme, the platinum load capacity is 0.05 ~ 2 wt%, and its optimal load capacity is in 0.25 ~ 0.75 wt%.
Above-mentioned Pt/TiO2The preparation method of/cotton fiber composite formaldehyde room-temperature oxidation catalyst, first by Titanium alkoxides in acid
Property the aqueous solution in hydrolyze, obtained after stirring stabilization TiO2Colloidal sol；Then infusion process is passed through by nano-TiO2It is equably coated
It is separated in cotton fiber surface, dry, obtain TiO2/ cotton fiber composite substrate materials；Then with TiO2/ cotton fiber is
Substrate, with chloroplatinic acid as predecessor, is separately added into complexing agent and reducing agent, then by dipping-reduction-sedimentation by active component
Pt is carried on TiO2Coating surface, it is multiple finally by alkali cleaning, washing, the residual chlorion on surface is removed, obtain Pt/TiO2/ cotton
Flower fiber composite formaldehyde room temperature oxidation catalyst.
By such scheme, described Pt/TiO2The preparation method of/cotton fiber composite formaldehyde room-temperature oxidation catalyst be by
Titanium alkoxides are dissolved in absolute ethyl alcohol, add acetylacetone,2,4-pentanedione, and stirring forms clear solution, is then added dropwise to pH=2 ~ 3 and contains PVA
Acidic aqueous solution in, the colloidal sol for obtaining stabilization for 4 ~ 8 days is stirred, then by infusion process by TiO2Nano-particle is equably coated
It is separated, be dried to obtain TiO in cotton fiber surface2/ cotton fiber composite substrate materials, its reclaimed water, absolute ethyl alcohol, acetyl
The mol ratio of acetone and Titanium alkoxides is=100：2~4：0.1~0.5：0.1~0.5；Contents of the PVA in acid water be 0.01 ~
0.1%；With chloroplatinic acid as predecessor, complexing agent and reducing agent are added, loaded active component Pt by dipping ~ reduction ~ sedimentation
In TiO2Coating surface, it is multiple finally by alkali cleaning, washing, the residual chlorion on surface is removed, obtain Pt/TiO after drying2/ cotton
Flower fiber composite formaldehyde room temperature oxidation catalyst.
By such scheme, described Titanium alkoxides are the one kind in the isopropyl ester of metatitanic acid four, butyl titanate or two kinds of mixing
Thing；Described acidic materials are nitric acid, sulfuric acid or the mixture of the two；Described complexing agent is trisodium citrate or ethylenediamine tetraacetic
Acetic acid disodium（EDTA）Or the mixture of the two；Described reducing agent is potassium borohydride, sodium borohydride or the mixture of the two.Institute
The alkali cleaning stated is to use NaOH, and the mixture of any one aqueous solution or wherein two kinds or three kinds materials in KOH and ammoniacal liquor is water-soluble
Liquid is washed.
Described infusion process is that cotton fiber is immersed in into TiO2In colloidal sol, soak time is 5 ~ 10 min, wherein cotton
And TiO2Mass ratio be 1：2~3；Described is separated into filter screen separation；Drying condition：First 50 ~ 70oUnder C, 3 ~ 10 are dried
Min, then 110 ~ 120oUnder C, 20 ~ 40 min are dried, above-mentioned coated process can repeat said process 1 ~ 2 time, last
Secondary drying temperature 60 ~ 110oC, the h of drying time 4 ~ 12.
Described dipping ~ reduction ~ sedimentation is：By TiO2/ cotton fiber composite is scattered in containing chloroplatinic acid and complexing
5 ~ 10 min are soaked in the mixed solution of agent, wherein chloroplatinic acid is calculated as accounting for TiO with Pt contents2/ cotton fiber composite substrate materials
0.05 ~ 2 wt%, be subsequently added into the alkaline solution of reducing agent（PH is between 8.0 ~ 10.0）, by noble metal into metal nano
Particle, wherein chloroplatinic acid, complexing agent are 1 with the mol ratio of reducing agent：2：5 ~ 30, continue to stir 5 ~ 10 min, then will deposition
The composite fibre for having Pt is separated with solution, 60 ~ 110oC dries 4 ~ 24 h, obtains Pt/TiO2/ cotton fiber composite formaldehyde room
Warm oxidation catalyst.
Pt/TiO provided by the present invention2/ cotton fiber composite formaldehyde room-temperature oxidation catalyst has graduation mesopore ~ big
Pore structure, lightweight and it is flexible the features such as, traditional catalyst can be avoided to be applied to need compressing tablet in filled-type cleaning equipment or enter one
Step is supported on the vapour lock that on other bulk type carriers could be used and produce greatly and the caducous problem of catalyst, can also be kept away
Exempt from there is a problem of frangibility in use as inorganic nano-fiber.Pt and TiO2Combined between coating and carrier cotton fiber
Firmly, active component simple substance Pt is in TiO2Between 1 ~ 10 nm, room temperature can efficient catalytic point for coating surface good dispersion, particle diameter
Solution formaldehyde, noble metal dosage is small, is suitable for being used in all kinds of air purifiers.
Compared with prior art, the present invention has the advantages that：
（1）Catalyst of the invention is inorganic-organic composite, Pt and TiO2Jail is combined between coating and carrier cotton fiber
Gu, while have graduation mesopore-macroporous structure, active component Pt components in the carrier good dispersion, particle diameter between 1-10 nm
And be efficiently catalyzing and oxidizing formaldehyde by 0 valency, room temperature, vapour lock is small, and precious metals pt consumption is small.
（2）The features such as catalyst prod has flexibility, light weight, suede bulk and is not easily broken, may be directly applied to various filling out
Fill in type cleaning equipment, traditional catalyst can be avoided to be applied to need compressing tablet in filled-type cleaning equipment or further loaded
The vapour lock that could use and produce on other bulk type carriers is big and the caducous problem of catalyst, can also avoid being received as inorganic
There is frangibility in use in rice fiber.
（3）Due to residual chlorion（From presoma chloroplatinic acid）There is strong influence to catalysis activity, it is therefore necessary to
Chlorion is removed, the method in the present invention using alkali cleaning and washing removes the chlorion of residual, is heated without subsequent high temperature and dechlorinated
Process has saved energy consumption.
（4）Preparation method process is simple, raw material sources are wide, low cost, reproducible, are adapted to industrialized production.
Brief description of the drawings
Fig. 1 is the FESEM photos of the catalyst sample prepared by the embodiment of the present invention 1.
Fig. 2 is the TEM of the catalyst sample prepared by the embodiment of the present invention 1（a）With high-resolution TEM（b）Photo.
Fig. 3 is the XPS spectrum figure of the catalyst prepared by the embodiment of the present invention 1.
Fig. 4 is the formaldehyde room temperature oxidation Activity Results figure of the catalyst of the embodiment of the present invention 1, and specially concentration of formaldehyde is with anti-
Answer time variation diagram.
Specific embodiment
Below in conjunction with specific embodiment of the invention, the present inventor's content is done and is further described, but this
The protection domain of invention is not limited to these embodiments.It is every to be included in without departing substantially from the change of present inventive concept or equivalent substitute
Within protection scope of the present invention.
Embodiment 1
（1）Butyl titanate is dissolved in absolute ethyl alcohol first, adds acetylacetone,2,4-pentanedione, stirring forms clear solution, then dropwise adds
To the acidity of the PVA containing 0.01 %（pH = 2）In the aqueous solution, the TiO for obtaining stabilization for 6 days is stirred2Colloidal sol, its reclaimed water, nothing
The mol ratio of water-ethanol, acetylacetone,2,4-pentanedione and butyl titanate is=100:2:0.5：0.5.
（2）Absorbent cotton is immersed in step（1）TiO2In colloidal sol, soak time is 5 min, wherein absorbent cotton and TiO2
Mass ratio be 1:2.0；After being separated through filter screen, first 60o5min is dried under C, then 115o30 min are dried under C, is repeated
Said process, but drying temperature is 60oC, drying time is 12 h, obtains TiO2/ cotton fiber composite substrate materials.
（3）Complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirred, by step（2）Middle acquisition
TiO2/ cotton fiber composite substrate materials are scattered in above-mentioned mixed solution soaks 5 min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 0.5 wt%, adds the alkaline solution of reducing agent potassium borohydride（PH value
10 or so are adjusted to the NaOH solution of 0.5 M）, chloroplatinic acid is reduced into metal nanoparticle, wherein chloroplatinic acid, complexing agent with
The mol ratio of reducing agent is 1:2:30, continue to stir 5 min, the cotton fiber that will then be loaded with platinum is separated, then with 0.1 M's
NaOH is washed 3 times, and deionized water is washed 3 times, and then 60 DEG C of h of drying 12, obtain Pt/TiO2/ cotton fiber Oxidation at room temperature is urged
Agent.
The Pt/TiO of above-mentioned preparation2Fig. 1, Fig. 2 and Fig. 3 are shown in the FESEM of/cotton fiber, TEM and XPS spectrum map analysis respectively,
Pt/TiO visible in Fig. 1, described2/ cotton fiber is in coated TiO2And fibre structure obtains intact holding before and after supporting Pt, its
Middle TiO2Particle diameter is supported on cotton fiber surface coating uniform between 1-10 nm, and precious metals pt exists with zeroth order simple substance form
（This can be seen that by two characteristic peaks of 71.2 eV in Fig. 3 and 74.8 eV）The nm of particle size range 3 ~ 10, is highly dispersed at TiO2Apply
Layer surface.
The preparation of the formaldehyde room temperature oxidation catalyst of embodiment 2
（1）Butyl titanate is dissolved in absolute ethyl alcohol first, adds acetylacetone,2,4-pentanedione, stirring forms clear solution, then dropwise adds
To the acidity of the PVA containing 0.05 %（pH = 2.5）In the aqueous solution, the TiO for obtaining stabilization for 8 days is stirred2Colloidal sol, its reclaimed water,
The mol ratio of acid, absolute ethyl alcohol, acetylacetone,2,4-pentanedione and butyl titanate is=100:4:0.5:0.5.
（2）Absorbent cotton is immersed in step（1）TiO2In colloidal sol, soak time is 5 min, wherein cotton and TiO2's
Mass ratio is 1:2.5, after being separated through filter screen, 60o12 h are dried under C, TiO is obtained2/ cotton fiber composite substrate materials.
（3）Complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirred, by step（2）Middle acquisition
TiO2/ cotton fiber composite substrate materials are scattered in above-mentioned mixed solution soaks 5 min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 0.25 wt%, adds the alkaline solution of reducing agent potassium borohydride（PH value
8 or so are adjusted to the NaOH solution of 0.5 M）, chloroplatinic acid is reduced into Pt nano-particles, wherein chloroplatinic acid, complexing agent with also
The mol ratio of former agent is 1:2:15, continue to stir 5 min, the cotton fiber that will then be loaded with platinum is separated, then with 0.1 M's
KOH is washed 3 times, and deionized water is washed 3 times, and then 80 DEG C of h of drying 10, obtain Pt/TiO2/ cotton fiber Oxidation at room temperature is catalyzed
Agent.
The preparation of the formaldehyde room temperature oxidation catalyst of embodiment 3
（1）Butyl titanate is dissolved in absolute ethyl alcohol first, adds acetylacetone,2,4-pentanedione, stirring forms clear solution, then dropwise adds
To the acidity of the PVA containing 0.01 %（pH = 3）In the aqueous solution, the TiO for obtaining stabilization for 4 days is stirred2Colloidal sol, its reclaimed water, nothing
The mol ratio of water-ethanol, acetylacetone,2,4-pentanedione and butyl titanate is=100:2:0.1:0.1.
（2）Absorbent cotton is immersed in TiO2In colloidal sol, soak time is 5 min, wherein cotton and TiO2Mass ratio be 1:
2, after being separated through filter screen, 80oC, drying time is 10 h, obtains TiO2/ cotton fiber composite substrate materials.
（3）Complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirred, by step（2）Middle acquisition
TiO2/ cotton fiber composite substrate materials are scattered in above-mentioned mixed solution soaks 5 min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 0.1 wt%, adds the alkaline solution of reducing agent potassium borohydride（PH value
8 or so are adjusted to the NaOH solution of 0.5 M）, chloroplatinic acid is reduced into Pt nano-particles, wherein chloroplatinic acid, complexing agent with also
The mol ratio of former agent is 1:2:5, continue to stir 5 min, the cotton fiber that will then be loaded with platinum is separated, then with 0.2 M's
NaOH is washed 3 times, and deionized water is washed 3 times, and then 60 DEG C of h of drying 12, obtain Pt/TiO2/ cotton fiber Oxidation at room temperature is catalyzed
Agent.
The preparation of the formaldehyde room temperature oxidation catalyst of embodiment 4
（1）Butyl titanate is dissolved in absolute ethyl alcohol first, adds acetylacetone,2,4-pentanedione, stirring forms clear solution, then dropwise adds
To the acidity of the PVA containing 0.01 %（pH = 2）In the aqueous solution, the TiO for obtaining stabilization for 6 days is stirred2Colloidal sol, its reclaimed water, nothing
The mol ratio of water-ethanol, acetylacetone,2,4-pentanedione and butyl titanate is=100:3:0.25:0.25.
（2）Absorbent cotton is immersed in TiO2In colloidal sol, soak time is 10 min, wherein cotton and TiO2Mass ratio be
1:3.0, after being separated through filter screen, first 60o10 min are dried under C, then 60oC, drying time is 12 h, obtains TiO2/ cotton
Flower fiber composite base material.
（3）Complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirred, by step（2）Middle acquisition
TiO2/ cotton fiber composite substrate materials soak 10 min in being scattered in above-mentioned mixed solution, and wherein chloroplatinic acid is relative in terms of platinum
In TiO2The quality of/cotton fiber composite substrate materials is 0.75 wt%, adds the alkaline solution of reducing agent sodium borohydride（pH
Value is adjusted to 9 or so with the NaOH solution of 0.5 M）, chloroplatinic acid is reduced into Pt nano-particles, wherein chloroplatinic acid, complexing agent with
The mol ratio of reducing agent is 1:2:15, continue to stir 5 min, the cotton fiber that will then be loaded with platinum is separated, then with 0.1 M's
Ammonia scrubbing 3 times, deionized water is washed 3 times, and then 100 DEG C of h of drying 6, obtain Pt/TiO2/ cotton fiber Oxidation at room temperature is urged
Agent.
The preparation of the formaldehyde room temperature oxidation catalyst of embodiment 5
（1）Tetraisopropyl titanate is dissolved in absolute ethyl alcohol first, add acetylacetone,2,4-pentanedione, stirring form clear solution, then by
It is added drop-wise to the acidity of the PVA containing 0.1 %（pH = 2）In the aqueous solution, the TiO for obtaining stabilization for 6 days is stirred2Colloidal sol, its reclaimed water,
The mol ratio of absolute ethyl alcohol, acetylacetone,2,4-pentanedione and tetraisopropyl titanate is=100:2:0.5:0.5.
（2）Absorbent cotton is immersed in TiO2In colloidal sol, soak time is 5 min, wherein cotton and TiO2Mass ratio be 1:
2, after being separated through filter screen, first 60o5 min are dried under C, then 100o6 h are dried under C, TiO is obtained2/ cotton fiber is combined
Base material.
（3）Complexing agent trisodium citrate will be added in platinum acid chloride solution again, stirred, by step（2）Middle acquisition
TiO2/ cotton fiber composite substrate materials are scattered in above-mentioned mixed solution soaks 5 min, wherein chloroplatinic acid in terms of platinum relative to
TiO2The quality of/cotton fiber composite substrate materials is 1.0 wt%, adds the alkaline solution of reducing agent sodium borohydride（PH value
10 or so are adjusted to the NaOH solution of 0.5 M）, chloroplatinic acid is reduced into Pt nano-particles, wherein chloroplatinic acid, complexing agent with also
The mol ratio of former agent is 1:2:30, continue to stir 5 min, the cotton fiber that will then be loaded with platinum is separated, then with respectively 0.1
NaOH the and KOH mixed liquors of M are washed 3 times, and deionized water is washed 3 times, and then 60 DEG C of h of drying 12, obtain Pt/TiO2/ cotton
Fiber room-temperature oxidation catalyst.
The preparation of the formaldehyde room temperature oxidation catalyst of embodiment 6
（1）Tetraisopropyl titanate is dissolved in absolute ethyl alcohol first, add acetylacetone,2,4-pentanedione, stirring form clear solution, then by
It is added drop-wise to the acidity of the PVA containing 0.1 %（pH = 2.5）In the aqueous solution, the TiO for obtaining stabilization for 6 days is stirred2Colloidal sol, wherein
The mol ratio of water, absolute ethyl alcohol, acetylacetone,2,4-pentanedione and tetraisopropyl titanate is=100:2:0.25:0.25.
（2）Absorbent cotton is immersed in TiO2In colloidal sol, soak time is 8 min, wherein cotton and TiO2Mass ratio be 1:
2.5, after being separated through filter screen, first 60o5 min are dried under C, then 120oC, drying time is 4 h, obtains TiO2/ cotton is fine
Dimension composite substrate materials.
（3）Complexing agent EDTA will be added in platinum acid chloride solution again, stirred, by step（2）The TiO of middle acquisition2/ cotton
Fiber composite base material is scattered in above-mentioned mixed solution and soaks 8 min, wherein chloroplatinic acid in terms of platinum relative to TiO2/ cotton
The quality of fiber composite base material is 2.0 wt%, adds the alkaline solution of reducing agent sodium borohydride（PH value is with 0.5 M's
NaOH solution is adjusted to 9 or so）, chloroplatinic acid is reduced into Pt nano-particles, wherein chloroplatinic acid, complexing agent and reducing agent mole
Than being 1:2:25, continue stir 5 min, will then be loaded with platinum cotton fiber separate, then with the respectively NaOH of 0.05 M,
KOH and ammoniacal liquor mixed solution are washed 3 times, and deionized water is washed 3 times, and then 110 DEG C of h of drying 4, obtain Pt/TiO2/ cotton is fine
Dimension room-temperature oxidation catalyst.
The preparation of the formaldehyde room temperature oxidation catalyst of embodiment 7
（1）Tetraisopropyl titanate is dissolved in absolute ethyl alcohol first, add acetylacetone,2,4-pentanedione, stirring form clear solution, then by
It is added drop-wise to the acidity of the PVA containing 0.25 %（pH = 2）In the aqueous solution, the TiO for obtaining stabilization for 4 days is stirred2Colloidal sol, wherein
The mol ratio of water, absolute ethyl alcohol, acetylacetone,2,4-pentanedione and tetraisopropyl titanate is=100:2:0.1:0.1.
（2）Absorbent cotton is immersed in TiO2In colloidal sol, soak time is 5 min, wherein cotton and TiO2Mass ratio be 1:
2.6, after being separated through filter screen, 60o4 min are dried under C, then 115oC, drying time is 30 min, repeats said process 1
It is secondary, finally 110o4 h are dried under C, TiO is obtained2/ cotton fiber composite substrate materials.
（3）Complexing agent EDTA will be added in platinum acid chloride solution again, stirred, by step（2）The TiO of middle acquisition2/ cotton
Fiber composite base material is scattered in above-mentioned mixed solution and soaks 5 min, wherein chloroplatinic acid in terms of platinum relative to TiO2/ cotton
The quality of fiber composite base material is 0.25 wt%, adds the alkaline solution of reducing agent sodium borohydride（PH value is with 0.5 M's
NaOH solution is adjusted to 10 or so）, chloroplatinic acid is reduced into Pt nano-particles, wherein chloroplatinic acid, complexing agent rubs with reducing agent
You are than being 1：2：15, continue to stir 5 min, the cotton fiber that will then be loaded with platinum is separated, then washs 3 with the KOH of 0.1 M
Time, deionized water is washed 3 times, and then 60 DEG C of h of drying 12, obtain Pt/TiO2/ cotton fiber room-temperature oxidation catalyst.
To investigate the catalyst for preparing of the invention catalyzing oxidizing degrading effect of formaldehyde at room temperature, the present inventor is pressed with lower section
Method is tested its room temperature degradation of formaldehyde performance.Test process is as follows：Take the g of catalyst 0.3 and be laid in a diameter of 14 cm's
Surface plate surface, covers glass cover, and then this be attached with the lucite reactor of the surface plate as 5.9 L of catalyst
In, reactor inner bottom part places a fan of 5 W, then by a certain amount of concentrated formaldehyde solution injecting reactor, opens fan,
To formaldehyde volatilization until concentration balance, glass cover is removed, now catalyst starts haptoreaction with formaldehyde, leads in the process
Cross multicomponent gas analyzer（INNOVA air Tech Instruments Model 1412）On-line monitoring formaldehyde and product
The change in concentration of carbon dioxide.
60 min activity datas of the catalyst prepared in embodiment 1 ~ 7 are shown in Table 1.As known from Table 1, catalyst of the invention
Under conditions of than relatively low Pt load capacity, good catalysis activity is respectively provided with.
Table 1
The another repeat performance to investigate catalyst of the present invention, the special catalyst sample by embodiment 1 is reused 4 times, is seen
Its Repeatability is examined, 2 is the results are shown in Table, as seen from Table 2：Catalyst of the invention is during multiple use, and activity is basic
Keep constant, illustrate catalyst activity stabilization of the present invention.
Table 2
Claims (4)
1. a kind of flexible platinum formaldehyde room temperature oxidation catalyst, it is characterised in that：The catalyst includes cotton fiber carrier, TiO2Table
Finishing coat and it is dispersed in TiO2The Pt active components of coating surface；
Described cotton fiber carrier is degreasing cotton fiber；
The TiO2Coating is nanometer titanium dioxide coating, is equably supported on cotton fiber surface, and particle diameter is between 1-10nm；
Described Pt exists in zeroth order form, particle size range 1-10 nm, and load capacity is 0.05-2 wt %.
2. a kind of preparation method of flexible platinum formaldehyde room temperature oxidation catalyst, it is characterised in that：The method comprises the following steps：
（1）Titanium alkoxides are dissolved in absolute ethyl alcohol, add acetylacetone,2,4-pentanedione, stirring form clear solution, be then added dropwise to containing
In the acidic aqueous solution of PVA, the TiO for obtaining stabilization for 4-8 days is stirred2Colloidal sol；
Contents of the described PVA in water be 0.01-0.1 %, its reclaimed water, absolute ethyl alcohol, acetylacetone,2,4-pentanedione and Titanium alkoxides mole
Than being 100:2-4:0.1-0.5:0.1-0.5；
Described Titanium alkoxides are one kind or two kinds of mixture in the isopropyl ester of metatitanic acid four, butyl titanate；
（2）Cotton fiber is immersed in step（1）TiO2In colloidal sol, soak time is 5-10 min, wherein cotton and TiO2's
Mass ratio is 1:2-3, immersion terminates rear filter screen and separates, and dries, and obtains TiO2/ cotton fiber composite substrate materials；
Described drying condition is：First in 50-70oUnder C, 3-10 min are dried, then in 110-120oUnder C, 20-40 is dried
Min, above-mentioned coated process can be repeated 1-2 times, the drying temperature 60-110 of last timeoC, drying time 4-12 h；
（3 by step（2）TiO2/ cotton fiber composite substrate materials are scattered in the mixed solution containing chloroplatinic acid and complexing agent and soak
Bubble 5-10 min, wherein chloroplatinic acid is calculated as accounting for TiO with Pt contents2The 0.05-2wt% of/cotton fiber composite substrate materials, then
The alkaline solution of reducing agent is added, Pt is reduced into the mol ratio of metal nanoparticle, wherein chloroplatinic acid, complexing agent and reducing agent
It is 1:2:5-30, continues to stir 5-10 min, and the composite fibre that will then deposit has Pt is separated with solution, then by alkali cleaning, water
The residual chlorion for repeatedly removing surface is washed, finally in 60-110oC dries 4-24 h, obtains Pt/TiO2/ cotton fiber is combined
Formaldehyde room temperature oxidation catalyst.
3. the preparation method of a kind of flexible platinum formaldehyde room temperature oxidation catalyst according to claim 2, it is characterised in that：Step
Suddenly（1）Described in PVA acidic aqueous solution in acidic materials be nitric acid, sulfuric acid or the mixture of the two；
The pH of the acidic aqueous solution of the PVA is between 2.0-3.0.
4. the preparation method of a kind of flexible platinum formaldehyde room temperature oxidation catalyst according to claim 2, it is characterised in that：Step
Suddenly（3）Described in complexing agent be trisodium citrate or disodium ethylene diamine tetraacetate（EDTA）Or the mixture of the two；
Described reducing agent is potassium borohydride, sodium borohydride or the mixture of the two；
Described alkali cleaning is to use NaOH, any one aqueous solution or the wherein two kinds or three kinds mixing of material in KOH and ammoniacal liquor
The thing aqueous solution is washed.
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